Abstract

A simple, rigorous electromagnetic formula is derived for
predicting the electromagnetic power provided by sources located in
transparent or dissipative planar microcavities. With this simple
approach, we compare numerically and experimentally the electromagnetic
power that escapes the microcavity when the source is located in a
metallodielectric or in an all-dielectric resonant planar
structure. Although a strong light-extraction coefficient might be
expected for metallodielectric microcavities, we show that these
attractive structures suffer from metal absorption even when thin
metallic layers are used. Experiments implemented with europium
chelates located in metallodielectric or in all-dielectric
microcavities confirm this result.

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